I think the first example was the whole iPod tax debate. We have these items, and the question became whether a television or an MP3 player is a piece of consumer electronics or is considered a computer part, which comes under a special tariff treatment. Depending upon what the answer is, there is a different tariff rate, and nobody was really quite sure.
There really doesn't seem to be any logical reason we should be putting tariffs on televisions and MP3 players in the first place. There's no domestic Canadian industry to protect there. That's one about tariff codes.
You have tariffs as well whereby there might be a 1% or 2% MFN rate placed on international imports and a 0% tariff rate for U.S. imports. For reasons of geography, basically everybody is importing from the U.S. anyway, but to get that 0% rate, you're having to go through all of this paperwork.
What you could instead do for everything from grape crushers to storage heating radiators to chemicals such as propylene polymers is reduce the MFN rate to zero. It wouldn't really change where we're importing from at all, and wouldn't change the amount of government revenue, because we're not collecting much revenue on these in the first place, and would save the government and businesses a lot of headaches.